Accurate Heat Stress measurements, on-site and real-time

Get the power of real-time, on-site environmental conditions monitoring with the Kestrel 3000 Heat Stress Monitor.

Professional and collegiate athletic trainers, storm chasers and wildland firefighters alike understand the importance of monitoring field conditions. You know you’re working hard - make sure you’re staying safe.

Real-time environmental monitoring keeps you from working past your limits.

From the accurate relative humidity readings, the Kestrel 3000 also calculates dewpoint and heat stress index —important information to know when working or playing outdoors in hot and humid conditions.

Used by NFL trainers to determine how frequently the athletes need to hydrate, and when the conditions are unhealthy for strenuous exercise.

ADDITIONAL PRODUCT INFO

Display updates every 1 second. After exposure to large environmental changes, all sensors require an equilibration period to reach stated accuracy. Measurements employing RH may require longer periods particularly after prolonged exposure to very high or very low humidity.

14° F to 131° F | -10 °C to 55 °C Measurements may be taken beyond the limits of the operational temperature range of the display and batteries by maintaining the unit within the operational range and then exposing it to the more extreme environment for the minimum time n ecessary to take reading.

*Note: Accuracy calculated as uncertainty of the measurement derived from statistical analysis considering the combined effects from primary sensor specifications, circuit conversions, and all other sources of error using a coverage factor of k=2, or two standard deviations (2Ʃ)

**Note: These specifications are valid for all Kestrel 1000, 2000, 2500, 3000, 3500 series with a serial number higher than 2262687. If your product has a lower serial number, please reference the K4000 specifications 329011.

Airflow of 2.2 mph|1 m/s or greater provides fastest response and reduction of insolation effect. For greatest accuracy, avoid direct sunlight on the temperature sensor and prolonged sunlight exposure to the unit in low airflow conditions.Calibration drift is negligible for the life of the product. For further details, see Display & Battery Operational Temperature Limits.

Relative Humidity

2%RH

0.1 %RH

10 to 90% 25°C non- condensing

To achieve stated accuracy, unit must be permitted to equilibrate to external temperature when exposed to large, rapid temperature changes and be kept out of direct sunlight. Calibration drift is typically less than ±0.25% per year.

Pressure

1.5 hPa|mbar 0.044 inHg 0.022 PSI

0.1 hPa|mbar 0.01 inHg 0.01 PSI

25°C/77°F 700-1100 hPa|mbar 20.67-32.48 inHg 10.15-15.95 PSI

Monolithic silicon piezo-resistive pressure sensor with second-order temperature correction. Between 1100–1600 mbar, unit will operate with reduced accuracy. Sensor may not operate above 1600 mbar and can be damaged above 6,000 mbar or below 10 mbar. Calibration drift is negligible for the life of the product.

Compass

5°

1° 1/16th Cardinal Scale

0 to 360°

2-axis solid-state magneto-resistive sensor mounted perpendicular to unit plane. Accuracy of sensor dependent upon unit’s vertical position. Self-calibration routine eliminates magnetic error from batteries or unit and must be run after every full power- down (battery removal or change). Readout indicates direction to which the back of the unit is pointed when held in a vertical orientation. Declination/variation adjustable for True North readout.

ADDITIONAL PRODUCT INFO

Display updates every 1 second. After exposure to large environmental changes, all sensors require an equilibration period to reach stated accuracy. Measurements employing RH may require longer periods particularly after prolonged exposure to very high or very low humidity. WBGT requires about 8 minutes to reach 95% accuracy and about 15 minutes to reach 99% accuracy after exposure to large environmental changes.

Data Storage & Graphical display, Min/Max/Avg History

Logged history stored and displayed for every measured value. Manual and auto data storage. Min/Max/Avg history may be reset independently. Auto-store interval settable from 2 seconds to 12 hours*, overwrite on or off. Logs even when display off except for 2 and 5 second intervals. Kestrel 5 series units hold over 10,000 data points.

14° F to 131° F | -10 °C to 55 °C Measurements may be taken beyond the limits of the operational temperature range of the display and batteries by maintaining the unit within the operational range and then exposing it to the more extreme environment for the minimum time necessary to take reading.

or below 10 mbar. Calibration drift is negligible for the life of the product.

CALCULATED MEASUREMENTS

MEASUREMENT

ACCURACY (+/-)

RESOLUTION

SENSORS EMPLOYED

Density Altitude

226 ft

69 m

1 ft

1 m

Temperature, Relative Humidity,

Pressure

Dew Point

3.4 °F

1.9 °C

15-95% RH. Refer to Range

for Temperature Sensor

0.1 °F

0.1 °C

Temperature, Relative Humidity

Heat Index

7.1°F

4.0°C

0.1 °F

0.1 °C

Temperature, Relative Humidity

THI (NRC)

1.5 °F

0.8 °C

0.1 °F

0.1 °C

Temperature, Relative Humidity

THI (Yousef)

2.3 °F

1.3 °C

0.1 °F

0.1 °C

Temperature, Relative Humidity

Wet Bulb Temperature - Psychrometric

3.2 °F

1.8 °C

0.1 °F

0.1 °C

Temperature, Relative Humidity

Pressure

ADDITIONAL PRODUCT INFO

Response Time & Display Update

Display updates every 1 second. After exposure to large environmental changes, all sensors require an equilibration period to reach stated accuracy. Measurements employing RH may require longer periods particularly after prolonged exposure to very high or very low humidity. WBGT requires about 8 minutes to reach 95% accuracy and about 15

minutes to reach 99% accuracy after exposure to large environmental changes.

0° F to 140° F |-18 °C to 60 °C Measurements may be taken beyond the limits of the operational temperature range of batteries by maintaining the unit within the operational range and then exposing it to the more extreme environment for the minimum time necessary to take reading.